Richard j



airnr F RICHARD J. BRIOE, OF BROOKLYN, NEIV YORK, ASSIGNOR OF ON E-HALF TO DANIEL CULHANE, OF SAME PLACE.

PROCESS OF UTlLlZlNG GALVANIZED WASTE.

SPECIFICATION forming part of Letters Patent No. 448,600, dated March 17, 1891.

Application filed April 1, 1890. $erial No. 346,224. (No specimens.)

To all whom it may concern: state of fusion, which usually takes place at- Be it known that I, RICHARD J. BRICE, a about 500 Fahrenheit. The metallic zinc subject of the Queen of Great Britain and will settle to the bottom and may be drawn 55 Ireland, now a resident of Brooklyn, in the off thence through an aperture in the lower 5 county of Kings and State of New York, have part of the vessel, suitably located, and alone invented a certain new and useful Process of or together with the metallic zinc screened Utilizing Galvanizerslvastc, of which the folout of the ashes, as hereinafter set forth, may lowing is a specification. be run into ingots, forming a good quality of 60 (Jlalvanizers waste consists of two quite difspelter. During the fusion of the waste I ferent products, one more technically known have prepared a tank of water heated to as sal-ammoniac skimmi'ngs and the other about 212 Fahrenheit, the quantity of water as zinc-ashes. As is well known, the first being about thirty gallons for each one hunproduct is secured by skimming the top of dred pounds of the material. 6 the galvanizing-bath when it is covered with Second. I gradually add the waste, now in I 5 sal-ammoniac, while the second, though usua state of fusion, to the heated water, which ally containing a very small percentage of is preferably well stirred during the opera salammoniac, is obtained by skimming the tion. I find that by so doing the particles of surface of the melted 21110 when the sal-amwaste will be and remain so disintegrated as 70 moniac has been practically swept back or to readily pass through an eighty-mesh sieve 2o skimmed off, or by skimming off the surface and to be easily acted upon by any subseof scrap-zinc while that is being melted alone. quently-added agent much more fully than Oxidation produces both substances, but they would be possible had said agent been added are quite different in their constituent parts. during the fusion or had the water been added 7 5 If immediately run into casks, as theyareby before fusion, and it is in this relative ar- 2 5 careful galvanizers, the sal-ammoniac skimrangement of steps that the main feature of mings may be very readily and economically my invention consists. To the mass thus distreated by the process I am about to describe; integrated I add lime, in the form of milk of but if thrown about anyhow and anywhere lime, to precipitate the Zinc, using of quick- 80 they are sometimes so affected by the exposlime a quantity about twenty per cent. in

ure as to need a preliminary pulverization, weight of the raw skimmings under treat and though this same process may be then ment, the water in which the lime is dissolved employed it is not of so much benefit, as the being sufficient in quantity and temperature expense and difficulty of pulverizing are not to reduce the temperature of the mass to about 85 thereby avoided. I have heretofore discov- 120 Fahrenheit, which permits and assists cred a method of treating the waste if it the precipitation, giving practically two promust be first pulverized; but, as stated, the ducts, chloride of calcium in solution and an present process is especially useful in trcatoxychloride of zinc as a precipitate. If the ing the carefully-preserved waste without a ammonia is of moment, the first is drawn off 0 preliminary pulverizing. and the ammonia recovered from it by add- 40 As the waste comes from the galvanizer the ing-a little slaked lime (about five per cent.) zinc, ammonia, and chloride it contains are and then distilling off the ammonia in the so united as to be of little value, and to sepordinary way. The precipitate is now in conarate these elements or some of them and so dit-ion to be used as a pigment, provided ex- 9 5 treat them as to render them of use is the obcess of moisture is driven off, which may be ject of my process, it being premised that to done by filter-pressing or by furnacing, the be a practical success such process must be former being preferable, as by it more of the inexpensive, and in this respect the present chloride of calcium is also driven off, leaving far exceeds all previous methods. In practhe proportion thereof a little less than it 100 ticing it I proceed as follows: otherwise would be. To the second (the pre- First. I take the sal-ammoniac skimmings, cipitate) I add a quantity of zinc-ashes, (or and placing itin a suitable vessel,preferably practically oxide of zinc,) about one hundred an iron pot, subject it to heatuntil it is inn per cent. in weight of thequantity of the skimmings originally treated, first screening out from the ashes the rough particles of metallic zinc. These particles, as above noted, may be,with or Without the metallic zinc of the sal-ammoniac skimmings, placed in a sweating-furnace, run into ingots, and used as spelter. The mass of the precipitate and the zinc-ashes, now in a thick paste, is then dried, (pulverized also, if desired) when it may be ground in oil and forms an excellent paint, or, after being pulverized, (a cyclone-pulverizer is useful for this purpose,) it may be calcined at a moderate heat, becoming; much lighter in color.

If the product is to be used as a pigment, it is not always necessary to run off the chlorideof-calcium solution, as above stated, but to the entire mass the ashes maybe added, varying the proportion in such case to about twothirds ashes to one-third sal-ammoniac skimmings, the additional lime therein in no Way injuring the product for the use named, and if the resulting moisture therein is more than about ten per cent. the excess above that may be driven off by furnacing or filter-pressing, as maybe found most convenient. This product is practically an oxychloride of zinc, for, as will be remembered, the elements necessary for the formation of such product have not been removed. Its use as a pigment is,I believe, new with myself, and, either ground in oils or mixed with colors, it forms a paint of more than ordinary body and durability, having excellent cover' 1g and drying qualities.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is

1. The process of treating sal-ammoniae skimmings, which consists in fusing them and gradually adding the fused mass to a quantity of water heated to about the boili ng-point, substantially as set forth.

2. The process of treating sal-ammoniac skimmings, which consists in fusing them, separating the metallic zinc from the remaining portion of the fused mass, substantially as set forth, gradually adding said remaining portion to a quantity of Water heated to about the boiling-point, precipitating the zinc by adding milk of lime, and separating the products by running off the solution, all substantially as set forth.

3. The process of treating sal-ammoniac skimmings, which consists in fusing them, separating the metallic zinc from the remaining portion of the fused mass, substantially as set forth, gradually adding said remaining portion to a quantity of water heated to about the boiling-point, precipitating the zinc by adding milk of lime, separating the products by running off the solution, and drying the precipitate, substantially as set forth.

4.. The process of treating sal-ammoniac skimmings, which consists in fusing them, separating the metallic zinc from the remaining portion of the fused mass, substantially as set forth, gradually adding said remaining portion to aquantityof Water heated to about the boiling-point, precipitating the zinc by adding milk of lime, adding zinc-ashes, and driving off excess of moisture, as set forth.

5. The process of treating sal-ammoniac skimmings, which consists in fusing them, separating the metallic zinc from the remaining portion of the fused mass, substantially as set forth, gradually adding said remaining portion to aquantityof Water heated to about the boiling-point, precipitating the zinc by adding milk of lime, separating the products by running off the solution, adding zinc-ashes, as set forth, and drying, all substantially as described.

Signed at New York, in the county of New York and State of New York, this 20th day of March, A. D. 1890.

RICHARD J. BRICE.

Witnesses.

AGNES S. FALES, A. G. N. VERMILYA.

Corrections in LettersPaieut hi0. 8,609.

It is hereby certified that Letters Patent No. 448,600, granted March 17, 1891, upon the application of Richard J. Brice, of Brooklyn New York, for an improvement in Process of Utilizing Galvanized Waste, were erroneously issued to said Brice and Daniel Oulhane, jointly said Gulhane appearing as owner of one-halfinterest in the patent; that said Letters Patent should have been issued to said Richard J. Brice as sole owner of said patent; also that the title of the invention in said Letters Patent was erroneously given as Process of Utilizing Galvanized aste instead of Process of Utilizing Galoanizers Waste; and that said Letters Patent should be read with these corrections therein that the same may conform to the record of the ease in the Patent Office.

Signed,'eountersigned and sealed this 28th day of April, A. D. 1891.

[sEAL] CYRUS BUSSEY,

Countersigned:

G. E. MITCHELL,

Coimnissz'oner of Patents.

Assistant Secretary of the Interior. 3 

